US2626766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor arrangement for singlerotor helicopters
Assignee: Bridgestone Firestone Inc
•
Filing: 1947-09-09
•
Granted: 1953-01-27
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 John E Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:37
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/39
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2380580A
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US1955501A
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US1977724A
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US2192139A
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US2108839A
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US2155881A
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US2225525A
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US2356692A
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US2428200A
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US2540473A
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US2546881A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |